<template>
    <div>
        <el-card>
            <!-- 面包屑导航 -->
            <el-breadcrumb separator-class="el-icon-arrow-right">
                <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
                <el-breadcrumb-item>商品管理</el-breadcrumb-item>
                <el-breadcrumb-item>分类参数</el-breadcrumb-item>
            </el-breadcrumb>

            <el-alert
            title="请选择对应的分类"
            type="warning"
            effect="dark" show-icon :closable="false">
            </el-alert>

            <!-- 选择商品分类区域 -->
            <el-row class="cat_opt">
                <el-col>
                    <span>选择商品分类:  </span>
                    <!-- 选择商品分类的级联选择框 -->
                    <el-cascader
                    v-model="selectedCateKeys"
                    :options="cateList"
                    :props="cateProps"
                    @change="handleChange"
                    clearable >
                    </el-cascader>
                </el-col>
            </el-row>

            <!-- table标签区域 -->
            <el-tabs v-model="activeName" @tab-click="handleTabClick">
            <el-tab-pane label="动态参数" name="many">
                <el-button type="primary" :disabled="isBtnDisabled" @click="addDialogVisible = true">添加参数</el-button>
                <!-- 动态参数表格 -->
                <el-table :data="manyTableData" border stripe>
                    <el-table-column type="expand">
                        <template slot-scope="scope">
                            <el-tag v-for="(item, i) in scope.row.attr_vals" :key="i" closable @close="handleClose(i, scope.row)">{{item}}</el-tag>

                            <el-input
                            class="input-new-tag"
                            v-if="scope.row.inputVisible"
                            v-model="scope.row.inputValue"
                            ref="saveTagInput"
                            size="small"
                            @keyup.enter.native="handleInputConfirm(scope.row)"
                            @blur="handleInputConfirm(scope.row)"
                            
                            >
                            </el-input>
                            <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>

                        </template>
                    </el-table-column>
                    <el-table-column type="index" label="#"></el-table-column>
                    <el-table-column label="参数名称" prop="attr_name"></el-table-column>
                    <el-table-column label="操作">
                        <template slot-scope="scope">
                            <el-button type="primary" icon="el-icon-setting" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                            <el-button type="danger" icon="el-icon-delete" @click="removeParams(scope.row.attr_id)">删除</el-button>
                        </template>
                    </el-table-column>
                </el-table>
            </el-tab-pane>

            <el-tab-pane label="静态属性" name="only">
                <el-button type="primary" :disabled="isBtnDisabled" @click="addDialogVisible = true">添加属性</el-button>
                <!-- 静态属性表格 -->
                <el-table :data="onlyTableData" border stripe>
                    <el-table-column type="expand">
                        <template slot-scope="scope">
                            <el-tag v-for="(item, i) in scope.row.attr_vals" :key="i" closable @close="handleClose(i, scope.row)">{{item}}</el-tag>

                            <el-input
                            class="input-new-tag"
                            v-if="scope.row.inputVisible"
                            v-model="scope.row.inputValue"
                            ref="saveTagInput"
                            size="small"
                            @keyup.enter.native="handleInputConfirm(scope.row)"
                            @blur="handleInputConfirm(scope.row)"
                            
                            >
                            </el-input>
                            <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>

                        </template>
                    </el-table-column>
                    <el-table-column type="index" label="#"></el-table-column>
                    <el-table-column label="属性名称" prop="attr_name"></el-table-column>
                    <el-table-column label="操作">
                        <template slot-scope="scope">
                            <el-button type="primary" icon="el-icon-setting" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                            <el-button type="danger" icon="el-icon-delete" @click="removeParams(scope.row.attr_id)">删除</el-button>
                        </template>
                    </el-table-column>
                </el-table>
            </el-tab-pane>
            
            </el-tabs>
        </el-card>

        <!-- 添加参数/属性的对话框 -->
            <el-dialog
            :title=" '添加' + titleText"
            :visible.sync="addDialogVisible"
            width="50%" @close="addDialogClosed">

            <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px">
            <el-form-item :label="titleText" prop="attr_name">
            <el-input v-model="addForm.attr_name"></el-input>
            </el-form-item>
            </el-form>

            <span slot="footer" class="dialog-footer">
            <el-button @click="addDialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="addParams">确 定</el-button>
            </span>
            </el-dialog>

        <!-- 修改参数/属性的对话框 --> 
        <el-dialog
            :title=" '修改' + titleText"
            :visible.sync="editDialogVisible"
            width="50%" @close="editDialogClosed">

            <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="100px">
            <el-form-item :label="titleText" prop="attr_name">
            <el-input v-model="editForm.attr_name"></el-input>
            </el-form-item>
            </el-form>

            <span slot="footer" class="dialog-footer">
            <el-button @click="editDialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="editParams">确 定</el-button>
            </span>
            </el-dialog>   
    </div>
</template>

<script>
export default {
    data() {
        return {
            cateList: [],
            selectedCateKeys: [],
            cateProps: {
                value: 'cat_id',
                label: 'cat_name',
                children: 'children',
                expandTrigger: 'hover',
                checkStrictly: true
            },
            activeName: 'many',
            manyTableData: [],
            onlyTableData: [],
            addDialogVisible: false,
            addForm: {
                attr_name: ''
            },
            addFormRules: {
                attr_name: [
                    {required: true, message: '请输入名称', trigger: 'blur'}
                    ]
            },
            editDialogVisible: false,
            editForm: {
                attr_name: '',
                attr_id: 0
                },
            editFormRules: {
                attr_name: [
                    {required: true, message: '请输入名称', trigger: 'blur'}
                ]
            },
            
        }
    },
    created() {
        this.getCateList()
    },
    methods: {
        async getCateList() {
           const {data: res} = await this.$http.get('categories')
           if(res.meta.status !== 200) {
               return this.$message.error('获取商品分类失败');
           }
           this.cateList = res.data
        },
        async getParamsData() {
            if(this.selectedCateKeys.length !== 3) {
                this.selectedCateKeys = []
                this.manyTableData = []
                this.onlyTableData = []
                return
            }
           const {data:res} = await this.$http.get(`categories/${this.cateId}/attributes`, {params: {sel: this.activeName}})
            res.data.forEach(item => {
                item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : []
                item.inputVisible = false
                item.inputValue = ''
            });
            if(this.activeName === 'many') {
                this.manyTableData = res.data
            }else {
                this.onlyTableData = res.data
            }
        },
        handleChange() {
            this.getParamsData()
        },
        handleTabClick() {
            this.getParamsData()
        },
        addParams() {
            this.$refs.addFormRef.validate(async valid => {
                if(!valid) return
               const {data: res} = await this.$http.post(`categories/${this.cateId}/attributes`, {attr_name: this.addForm.attr_name, attr_sel: this.activeName})
               if(res.meta.status !== 201) {
                   return this.$message.error('添加失败')
               }
               this.$message.success('添加成功')
               this.addDialogVisible = false
               this.getParamsData()
            })
        },
        addDialogClosed() {
            this.$refs.addFormRef.resetFields()
        },
        async showEditDialog(attr_id) {
           const {data: res} = await this.$http.get(`categories/${this.cateId}/attributes/${attr_id}`, {params: {attr_sel: this.activeName}})
           if(res.meta.status !== 200) {
               return this.$message.error('获取参数信息失败')
           }
           this.editForm = res.data
           this.editDialogVisible = true
        },
        editDialogClosed() {
            this.$refs.editFormRef.resetFields()
        },
        editParams() {
            this.$refs.editFormRef.validate(async valid => {
                if(!valid) return
               const {data: res} = await this.$http.put(`categories/${this.cateId}/attributes/${this.editForm.attr_id}`, {attr_name: this.editForm.attr_name, attr_sel: this.activeName})
               if(res.meta.status !== 200) {
               return this.$message.error('修改参数信息失败') 
               }
               this.$message.success('修改参数信息成功')
               this.getParamsData()
               this.editDialogVisible = false
            })
        },
        async removeParams(id) {
           const confirmResult = await this.$confirm('此操作将永久删除该参数, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)
            if(confirmResult !== 'confirm') {
                return this.$message.info('取消了删除')
            }
           const {data: res} = await this.$http.delete(`categories/${this.cateId}/attributes/${id}`)
           if(res.meta.status !== 200) {
               return this.$message.error('删除失败')
           }
           this.$message.success('删除成功')
           this.getParamsData()
        },
        async handleInputConfirm(row) {
            if(row.inputValue.trim().length === 0) {
                row.inputValue = ''
                row.inputVisible = false
                return
            }
            row.attr_vals.push(row.inputValue.trim())
            row.inputValue = ''
            row.inputVisible = false
            this.saveAttrVals(row)
            /* const {data: res} = await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`, {attr_name: row.attr_name, attr_sel: row.attr_sel, attr_vals: row.attr_vals.join(' ')})
            if(res.meta.status !== 200) {
                return this.$message.error('添加shuxing失败')
            }
            this.$message.success('添加成功')  */
        },
        async saveAttrVals(row) {
            const {data: res} = await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`, {attr_name: row.attr_name, attr_sel: row.attr_sel, attr_vals: row.attr_vals.join(' ')})
            if(res.meta.status !== 200) {
                return this.$message.error('添加shuxing失败')
            }
            this.$message.success('修改成功')
        },
        showInput(row) {
            row.inputVisible = true
            this.$nextTick(_ => {
            this.$refs.saveTagInput.$refs.input.focus();
        })
        },
        handleClose(i, row) {
            row.attr_vals.splice(i, 1)
            this.saveAttrVals(row)
        }

    },
    computed: {
        isBtnDisabled() {
            if(this.selectedCateKeys.length !== 3) {
                return true
            }
            return false
        },
        cateId() {
            if(this.selectedCateKeys.length === 3) {
                return this.selectedCateKeys[2]
            }
            return null
        },
        titleText() {
            if(this.activeName === 'many') {
                return '动态参数'
            }
            return '静态属性'
        }
    }
}
</script>

<style lang="less" scoped>
    .el-breadcrumb {
        margin-bottom: 15px;
    }
    .cat_opt {
        margin: 15px 0;
    }
    .input-new-tag {
        width: 200px;
    }
</style>